US2503593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for determining and recording whether or not a railway axle crown bearing has been operated at a predetermined critical temperature
Assignee: RAILWAY SERVICE AND SUPPLY CORP
•
Filing: 1945-04-23
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Granted: 1950-04-11
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Expires: 1965-04-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Pearce
- 👤 Leonard D Grisbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:02
CPC Classifications
B; B61; B61K; B61K9/00; B61K9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US142190A
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US1668090A
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US1345767A
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US1512456A
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US1746363A
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US1924793A
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US1788794A
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US1938583A
Cited
US2114762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |